Hitachi GS4000 Series Installation Manual page 43

*
(3) Power supply modules quantity and installation positions
The GS4000 power supply redundancy is of the type "2+2". The GS4000 requires two active
power supply modules and two standby power supply modules. For detailed information about
installation positions of power supply modules, see the table below.
Table 1.1-11 Installation positions of power supply modules
power supply
power supply
redundancy
NOT redundant
Type "2+2"
Redundant
*
(4) LEDs (Light Emitting Diode) and Switches
The LED of a chassis indicates the action status of a fan unit, BCU , PSU and high port-
density PSU-integrated NIF.
The LED is attached to the fan, and the status indicated by the LED differs depending on the
type of a device or the position where the fan unit is installed.
As for the status indicated by the each LED of a chassis, see Table 1.1-12. Refer to the section
"1.3 Power Supply," "1.4 Basic Control Module (BCU)," or "1.6 Network Interface Module (NIF)"
for the LED and switches of other components.
520-10-026-30X
NOTE: For the high port-density NIF and the high port-density PSU-integrated NIF, the
NIF number given to them by the system when they are installed are those
indicated with "＊1" in the figure above.
active
POW0-0
○
○
NOTE: If only one power supply module is installed, GS4000 will not become active even
after the GS4000 is powered on.
GS4000 Installation Guide Revision 4.00
standby active
POW1-0 POW0-1
× ○
○ ○
standby
POW1-1
×
○
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